What are male and female molds?
Male and female molds are the only two fundamental types of forms, but they yield significantly different finished parts. The least time consuming and cheapest method is the male or positive mold. This is a form that mimics the final shape of the part, but the part is fabricated over its outer surface. Male molds should be used when fewer than 5-10 parts are being produced. Larger runs usually warrant the time and cost of female molds. Female or cavity molds are generally more costly, but they offer numerous advantages for medium to large production runs. Finishing time is significantly reduced because every part emerges with a smooth outer surface. Female molds also lend themselves to use with core materials because the outer skin is always a smooth regardless of how inconsistently the core is used inside the part.
